@import url('https://fonts.googleapis.com/css?family=Lato|Russo+One');

.container {
	position: absolute;
	top: 0;
	left: 0;
	width: 100vw;
	height: 100vh;
	overflow: hidden;
}

//stars
.container_star {
	background-image: linear-gradient(to bottom, #292256 0%, #8446cf 70%, #a871d6 100%);
	&:after {
		background: radial-gradient(
			ellipse at center,
			rgba(255, 255, 255, 0) 0%,
			rgba(255, 255, 255, 0) 40%,
			rgba(15, 10, 38, 0.2) 100%
		);
		content: '';
		width: 100%;
		height: 100%;
		position: absolute;
		top: 0;
	}
}
.star_1 {
	position: absolute;
	border-radius: 50%;
	background-color: #ffffff;
	animation: twinkle 5s infinite ease-in-out;
	&:after {
		height: 100%;
		width: 100%;
		transform: rotate(90deg);
		content: '';
		position: absolute;
		background-color: #fff;
		border-radius: 50%;
	}
	&:before {
		background: radial-gradient(
			ellipse at center,
			rgba(255, 255, 255, 0.5) 0%,
			rgba(255, 255, 255, 0) 60%,
			rgba(255, 255, 255, 0) 100%
		);
		position: absolute;
		border-radius: 50%;
		content: '';
		top: -20%;
		left: -50%;
	}
}
@for $i from 1 through (30) {
	$top: random(100) + vh;
	$left: random(100) + vw;
	$size: random(6) + 3px;
	.star_1:nth-of-type(#{$i}) {
		top: $top;
		left: $left;
		width: $size;
		height: calc($size / 3);
		animation-delay: random(5) + s;
		&:before {
			width: $size * 2;
			height: $size * 2;
			top: -250%;
		}
	}
}
.star_2 {
	position: absolute;
	border-radius: 50%;
	background-color: #ffffff;
	animation: twinkle 5s infinite ease-in-out;
}
@for $i from 31 through (60) {
	$top: random(100) + vh;
	$left: random(100) + vw;
	$size: random(3) + 1px;
	.star_2:nth-of-type(#{$i}) {
		top: $top;
		left: $left;
		width: $size;
		height: $size;
		animation-delay: random(5) + s;
		&:before {
			width: $size * 2;
			height: $size * 2;
			top: -250%;
		}
	}
}

//text and moon
.container_title {
	width: 600px;
	height: 450px;
	left: 50%;
	top: 50%;
	transform: translate(-50%, -50%);
	position: absolute;
	color: white;
	line-height: 1;
	font-weight: 700;
	text-align: center;
	justify-content: center;
	align-items: center;
	flex-direction: column;
	display: flex;
}
.title > * {
	display: inline-block;
	font-size: 200px;
}
.number {
	text-shadow: 20px 20px 20px rgba(0, 0, 0, 0.2);
	padding: 0 0.2em;
	font-family: 'Russo One', sans-serif;
}
.subtitle {
	font-size: 25px;
	margin-top: 1.5em;
	font-family: 'Lato', sans-serif;
	text-shadow: 4px 4px 4px rgba(0, 0, 0, 0.2);
}
button {
	font-size: 22px;
	margin-top: 1.5em;
	padding: 0.5em 1em;
	letter-spacing: 1px;
	font-family: 'Lato', sans-serif;
	color: white;
	background-color: transparent;
	border: 0;
	cursor: pointer;
	z-index: 999;
	border: 2px solid white;
	border-radius: 5px;
	text-shadow: 4px 4px 4px rgba(0, 0, 0, 0.2);
	transition: opacity 0.2s ease;
	&:hover {
		opacity: 0.7;
	}
	&:focus {
		outline: 0;
	}
}
.moon {
	position: relative;
	border-radius: 50%;
	width: 160px;
	height: 160px;
	z-index: 2;
	background-color: #fff;
	box-shadow: 0 0 10px #fff, 0 0 20px #fff, 0 0 30px #fff, 0 0 40px #fff, 0 0 70px #fff,
		0 0 80px #fff, 0 0 100px #ff1177;
	animation: rotate 5s ease-in-out infinite;
	.face {
		top: 60%;
		left: 47%;
		position: absolute;
		.mouth {
			border-top-left-radius: 50%;
			border-bottom-right-radius: 50%;
			border-top-right-radius: 50%;
			background-color: #5c3191;
			width: 25px;
			height: 25px;
			position: absolute;
			animation: snore 5s ease-in-out infinite;
			transform: rotate(45deg);
			box-shadow: inset -4px -4px 4px rgba(0, 0, 0, 0.3);
		}
		.eyes {
			position: absolute;
			top: -30px;
			left: -30px;
			.eye_left,
			.eye_right {
				border: 4px solid #5c3191;
				width: 30px;
				height: 15px;
				border-bottom-left-radius: 100px;
				border-bottom-right-radius: 100px;
				border-top: 0;
				position: absolute;
				&:before,
				&:after {
					content: '';
					position: absolute;
					border-radius: 50%;
					width: 4px;
					height: 4px;
					background-color: #5c3191;
					top: -2px;
					left: -4px;
				}
				&:after {
					left: auto;
					right: -4px;
				}
			}
			.eye_right {
				left: 50px;
			}
		}
	}
}

//birds
.container_bird {
	perspective: 2000px;
	width: 100%;
	height: 100%;
	position: absolute;
	top: 0;
	left: 0;
	bottom: 0;
	right: 0;
}
.bird {
	position: absolute;
	z-index: 1000;
	left: 50%;
	top: 50%;
	height: 40px;
	width: 50px;
	transform: translate3d(-100vw, 0, 0) rotateY(90deg);
	transform-style: preserve-3d;
}
.bird_container {
	left: 0;
	top: 0;
	width: 100%;
	height: 100%;
	transform-style: preserve-3d;
	transform: translate3d(50px, 30px, -300px);
}
.wing {
	position: absolute;
	left: 0;
	top: 0;
	right: 0;
	bottom: 0;
	border-radius: 3px;
	transform-style: preserve-3d;
	transform-origin: center bottom;
	z-index: 300;
}
.wing_left {
	background: linear-gradient(to bottom, #a58dc4 0%, #7979a8 100%);
	transform: translate3d(0, 0, 0) rotateX(-30deg);
	animation: wingLeft 1.3s cubic-bezier(0.45, 0, 0.5, 0.95) infinite;
}
.wing_right {
	background: linear-gradient(to bottom, #d9d3e2 0%, #b8a5d1 100%);
	transform: translate3d(0, 0, 0) rotateX(-30deg);
	animation: wingRight 1.3s cubic-bezier(0.45, 0, 0.5, 0.95) infinite;
}
.wing_right_top,
.wing_left_top {
	border-right: 25px solid transparent;
	border-left: 25px solid transparent;
	top: -20px;
	width: 100%;
	position: absolute;
	transform-origin: 100% 100%;
}
.wing_right_top {
	border-bottom: 20px solid #b8a5d1;
	transform: translate3d(0, 0, 0) rotateX(60deg);
	animation: wingRightTop 1.3s cubic-bezier(0.45, 0, 0.5, 0.95) infinite;
}
.wing_left_top {
	border-bottom: 20px solid #7979a8;
	transform: translate3d(0, 0, 0) rotateX(-60deg);
	animation: wingLeftTop 1.3s cubic-bezier(0.45, 0, 0.5, 0.95) infinite;
}
.bird_anim:nth-child(1) {
	animation: bird1 30s linear infinite forwards;
}
.bird_anim:nth-child(2) {
	animation: bird2 30s linear infinite forwards;
	animation-delay: 3s;
	z-index: -1;
}
.bird_anim:nth-child(3) {
	animation: bird3 30s linear infinite forwards;
	animation-delay: 5s;
}
.bird_anim:nth-child(4) {
	animation: bird4 30s linear infinite forwards;
	animation-delay: 7s;
}
.bird_anim:nth-child(5) {
	animation: bird5 30s linear infinite forwards;
	animation-delay: 14s;
}
.bird_anim:nth-child(6) {
	animation: bird6 30s linear infinite forwards;
	animation-delay: 10s;
	z-index: -1;
}

//keyframes
@keyframes rotate {
	0%,
	100% {
		transform: rotate(-8deg);
	}
	50% {
		transform: rotate(0deg);
	}
}

@keyframes snore {
	0%,
	100% {
		transform: scale(1) rotate(30deg);
	}
	50% {
		transform: scale(0.5) rotate(30deg);
		border-bottom-left-radius: 50%;
	}
}

@keyframes twinkle {
	0%,
	100% {
		opacity: 0.7;
	}
	50% {
		opacity: 0.3;
	}
}

@keyframes wingLeft {
	0%,
	100% {
		transform: translate3d(0, 0, 0) rotateX(-50deg);
	}
	50% {
		transform: translate3d(0, -20px, 0) rotateX(-130deg);
		background: linear-gradient(to bottom, #d9d3e2 0%, #b8a5d1 100%);
	}
}

@keyframes wingLeftTop {
	0%,
	100% {
		transform: translate3d(0, 0, 0) rotateX(-10deg);
	}
	50% {
		transform: translate3d(0px, 0px, 0) rotateX(-40deg);
		border-bottom: 20px solid #b8a5d1;
	}
}

@keyframes wingRight {
	0%,
	100% {
		transform: translate3d(0, 0, 0) rotateX(50deg);
	}
	50% {
		transform: translate3d(0, -20px, 0) rotateX(130deg);
		background: linear-gradient(to bottom, #a58dc4 0%, #7979a8 100%);
	}
}

@keyframes wingRightTop {
	0%,
	100% {
		transform: translate3d(0, 0, 0) rotateX(10deg);
	}
	50% {
		transform: translate3d(0px, 0px, 0px) rotateX(40deg);
		border-bottom: 20px solid #7979a8;
	}
}

@keyframes bird1 {
	0% {
		transform: translate3d(-120vw, -20px, -1000px) rotateY(-40deg) rotateX(0deg);
	}
	100% {
		transform: translate3d(100vw, -40vh, 1000px) rotateY(-40deg) rotateX(0deg);
	}
}

@keyframes bird2 {
	0%,
	15% {
		transform: translate3d(100vw, -300px, -1000px) rotateY(10deg) rotateX(0deg);
	}
	100% {
		transform: translate3d(-100vw, -20px, -1000px) rotateY(10deg) rotateX(0deg);
	}
}

@keyframes bird3 {
	0% {
		transform: translate3d(100vw, -50vh, 100px) rotateY(-5deg) rotateX(-20deg);
	}
	100% {
		transform: translate3d(-100vw, -10vh, 100px) rotateY(-5deg) rotateX(-20deg);
	}
}

@keyframes bird4 {
	0% {
		transform: translate3d(100vw, 30vh, 200px) rotateY(-5deg) rotateX(10deg);
	}
	100% {
		transform: translate3d(-100vw, -30vh, 200px) rotateY(-5deg) rotateX(10deg);
	}
}

@keyframes bird5 {
	0%,
	5% {
		transform: translate3d(100vw, 30vh, 400px) rotateY(-15deg) rotateX(-10deg);
	}
	100% {
		transform: translate3d(-100vw, 10vh, 400px) rotateY(-15deg) rotateX(-10deg);
	}
}

@keyframes bird6 {
	0%,
	10% {
		transform: translate3d(-100vw, 20vh, -500px) rotateY(15deg) rotateX(10deg);
	}
	100% {
		transform: translate3d(100vw, 40vh, -800px) rotateY(5deg) rotateX(10deg);
	}
}
@media screen and (max-width: 580px) {
	.container_404 {
		width: 100%;
	}
	.number {
		font-size: 100px;
	}
	.subtitle {
		font-size: 20px;
		padding: 0 1em;
	}
	.moon {
		width: 100px;
		height: 100px;
	}
	.face {
		transform: scale(0.7);
	}
}
